Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
PLEONASMS
are words too many or redundancies. In Assemble everyone all together in the dining room, all together is superfluous unless the tone or style is helped by the extra stress on “togetherness.” Otherwise, Assemble everyone in the dining room is enough. In good exposition, a pleonasm may once in a great while assist you in achieving clarity, but be sparing.
